Addition of Foam Agent Using Polyester and Polystyrene Waste for Lightweight Mixed

The development of the Indonesian industry has made considerable progress, which has had a positive impact on the country's economy. In addition to the increasingly rapid success of the industry, the negative impacts are more and more waste generated by the Indonesian industry, such as fiber strapping bands and polystyrene waste that is difficult to break down. This encourages researchers to be able to manage waste results, so that they can be reused without polluting the environment, for example by converting fiber strips into waste and polystyrene into a mix of materials for the manufacture of light bricks. Dr. Soetomo Surabaya says that the higher the percentage of polyester, the higher the compressive strength and tensile strength produced, University trials have shown. These results are inversely proportional to the weight of the light brick volume indicated by the increase in the number of strapping bands, further decreasing the weight of the lightweight brick to conform to the Indonesian National Standard for Lightweight Brick. The optimum polyester content is 6% 30 mm polyester fiber, giving a maximum compressive strength of 3 208 MPa (142.85%) with a tensile strength of 0.54 MPa (63.64 mm). %) and a decrease in weight to 1250 kg / m3 (7.75%).